--- libs/tcmalloc-1.4/CMakeLists.txt.orig	2012-09-29 03:33:39 UTC
+++ libs/tcmalloc-1.4/CMakeLists.txt
@@ -1,6 +1,6 @@ PROJECT(TCMALLOC CXX)
 PROJECT(TCMALLOC CXX)
 
-CMAKE_MINIMUM_REQUIRED(VERSION 2.6)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.10)
 
 # Default location for installed software/configs/ docs is the build directory.
 SET(CMAKE_INSTALL_PREFIX
@@ -32,10 +32,10 @@ IF(UNIX)
     "-Os -DNDEBUG"
     CACHE STRING "Flags used by the compiler during release minsize builds." FORCE)
   SET(CMAKE_CXX_FLAGS_RELWITHDEBINFO
-    "-O3 -g -DDEBUG"
+    " -g -DDEBUG"
     CACHE STRING "Flags used by the compiler during release builds." FORCE)
   SET(CMAKE_CXX_FLAGS_RELEASE
-    "-O3 -DNDEBUG"
+    " -DNDEBUG"
     CACHE STRING "Flags used by the compiler during release builds." FORCE)
 ENDIF(UNIX)
 
@@ -76,7 +76,7 @@ IF(NOT MSVC)
 
 ADD_LIBRARY(tcmalloc-1.4 STATIC ${TCMALLOC_SOURCES})
 IF(NOT MSVC)
-  TARGET_LINK_LIBRARIES(tcmalloc-1.4 pthread)
+  TARGET_LINK_LIBRARIES(tcmalloc-1.4 -pthread)
 ENDIF(NOT MSVC)
 INSTALL(TARGETS tcmalloc-1.4 DESTINATION ${CMAKE_INSTALL_PREFIX}/lib)
 SET(tcmalloc_BUILT 1 CACHE INTERNAL "")